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(2010•郴州)如图,圆锥的底面半径为3cm,母线长为6cm,那么这个圆锥的侧...
(2010•郴州)如图,圆锥的底面半径为3cm,母线长为6cm,那么这个圆锥的侧面积是
cm
2(结果保留π).
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